List of practice Questions

At 50 °C, the vapour pressure of pure benzene is 268 torr. The number of moles of non-volatile solute per mole of benzene required to prepare a solution having a vapour pressure of 167 torr at the same temperature is

The formula of a metal oxide is M_0.96 O₁. The fractions of metal that exists as M³⁺and M²⁺ ions in that oxide are respectively

An alkene X on ozonolysis gives a mixture of Propan-2-one and methanal. What is X?

The aromatic compound/species with maximum number of x ^-electrons is

A bar magnet falls from rest under gravity through the center of a horizontal ring of conducting wire as shown in the figure,

a horizontal ring of conducting wire A bar magnet falls

Which of the following graph best represents the speed (v) vs. time(t) graph of the bar magnet?

Identify the correct statement about the oxidation states of group 14 elements

An earth's satellite near the surface of the earth takes about 90 min per revolution. A satellite orbiting the moon also takes about 90 min per revolution. Then which of the following is true? (\(\rho\)_m is the density of the moon and ρe is the density of the earth).

Aluminum reacts with dilute HCL and liberates a gas 'A' and with aqueous alkali liberates a gas 'B'. A and B respectively are

Two substances A and B of the same mass are heated at a constant rate. The variation of temperature θ of the substances with time t is shown in the figure. Choose the correct statement

A given quantity of gas is taken from A to C in two ways; a) directly from A\(\rightarrow\)C along a straight line and b) in two steps, from A\(\rightarrow\)B and then from B\(\rightarrow\)C.Work done and heat absorbed along the direct path A\(\rightarrow\)C are 200J and 280J respectively. If the work done along A\(\rightarrow\)B\(\rightarrow\)C is 80J, then heat absorbed along the path is,

The alkali metal with the lowest E M^-M⁺(V) is X and the alkali metal with highest E M^- M⁺is Y. Then X and Y are respectively:

The hybrids of which group elements of the periodic table form electron precise hybrids?

In a simple harmonic motion, let f be the acceleration and T be the time period. If x denotes the displacement, then |fT| vs. x graph will look like:

Which of the following does not form a buffer solution?

For the reaction at 25° C, X₂O₄ (l) → 2XO₂(g), U and S are 2.1 K.Cal and 20 Cal/K respectively. what is G for the reaction at the same temperature? (R = 2 CAL K^-1MOL^-1)

A mouse of mass m jumps on the outside edge of a rotating ceiling fan of the moment of inertia l and radius R. The frictionless loss of angular velocity of the fan as a result is,

Which one of the following has the same number of atoms as are in 6g of H₂O

In an experiment, the length of an object is measured to be 6.50 cm. This measured value can be written as 0.0650 m.The number of significant figures on 0.0650m is

The rate of diffusion of a gas A is √5 times more than of gas B. If the molar mass of A is x gmol^-1, the molar mass of B ( in g mole^-1) is

A body of mass 2 kg moves in a horizontal circular path of radius 5m. In an instant its speed is \(2\sqrt5\) m/s and is increasing at the rate of 3 m/s².The magnitude of the force acting on the body at the instant is,

Match the following : List -I (Atomic number) List II (Group number and period number)

	List -I (Atomic number)		List II (Group number and period number)
A)	56	I)	9,4
B)	50	II)	3,6
C)	27	III)	14,5
D)	58	IV)	2,6

If the potential energy of a hydrogen atom in the first excited state is assumed to be zero.Then total energy of n=∞ state is,

The number of electrons with (n+1) values equal to 3,4 and 5 in an element with atomic number (z) 24 are respectively (n = principal quantum number and l = azimuthal quantum number)

The energy of second orbit of hydrogen atom is -5.45x10^-19 J. What is the energy of first orbit of Li²⁺ ion (in J)

Three identical convex lenses each of focal length f are placed in a straight line separated by a distance f from each other. An object is located in \(\frac{f}{2}\) in front of the leftmost lens. Then,